tor-browser

The Tor Browser
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WebGLSync.cpp (2092B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #include "WebGLSync.h"
      7 
      8 #include "GLContext.h"
      9 #include "WebGLContext.h"
     10 #include "mozilla/dom/WebGL2RenderingContextBinding.h"
     11 
     12 namespace mozilla {
     13 
     14 WebGLSync::WebGLSync(WebGLContext* webgl, GLenum condition, GLbitfield flags)
     15    : WebGLContextBoundObject(webgl),
     16      mGLName(mContext->gl->fFenceSync(condition, flags)),
     17      mFenceId(mContext->mNextFenceId) {
     18  mContext->mNextFenceId += 1;
     19 }
     20 
     21 WebGLSync::~WebGLSync() {
     22  if (!mContext) return;
     23  mContext->gl->fDeleteSync(mGLName);
     24  mGLName = 0;
     25 }
     26 
     27 ClientWaitSyncResult WebGLSync::ClientWaitSync(const GLbitfield flags,
     28                                               const GLuint64 timeout) {
     29  if (!mContext) return ClientWaitSyncResult::WAIT_FAILED;
     30  if (IsKnownComplete()) return ClientWaitSyncResult::ALREADY_SIGNALED;
     31  if (!mGLName) return ClientWaitSyncResult::WAIT_FAILED;
     32 
     33  auto ret = ClientWaitSyncResult::WAIT_FAILED;
     34  bool newlyComplete = false;
     35  const auto status = static_cast<ClientWaitSyncResult>(
     36      mContext->gl->fClientWaitSync(mGLName, 0, 0));
     37  switch (status) {
     38    case ClientWaitSyncResult::TIMEOUT_EXPIRED:  // Poll() -> false
     39    case ClientWaitSyncResult::WAIT_FAILED:      // Error
     40      ret = status;
     41      break;
     42    case ClientWaitSyncResult::CONDITION_SATISFIED:  // Should never happen, but
     43                                                     // tolerate it.
     44    case ClientWaitSyncResult::ALREADY_SIGNALED:     // Poll() -> true
     45      newlyComplete = true;
     46      ret = status;
     47      break;
     48  }
     49 
     50  if (newlyComplete) {
     51    if (mContext->mCompletedFenceId < mFenceId) {
     52      mContext->mCompletedFenceId = mFenceId;
     53    }
     54    MOZ_RELEASE_ASSERT(mOnCompleteTasks);
     55    for (const auto& task : *mOnCompleteTasks) {
     56      (*task)();
     57    }
     58    mOnCompleteTasks = {};
     59  }
     60  return ret;
     61 }
     62 
     63 }  // namespace mozilla